we think both secretary gates and secretary panetta have been clear on this issue. a certain percentage of gdp that we would like our nato allies and partners to spend on their defense. that is how we constantly have this discussion. the other thing we could do, is we have to have complementary capabilities. we want to build complementary capabilities throughout with our nato allies, our other partners, our asian partners. we're really trying to focus in those areas. that is white is important to understand where where everybody is investing in where we have gaps -- why it is important to understand where everybody is investing and where we have gaps. >> let's do the last question. over here. >> thank you. retired from brookings. you mentioned that more than a million us servicemen have served in iraq and afghanistan. that is a very small percentage of the total american population. a very small percentage of you and your colleagues have borne this cost, the battle. my question is, what about national service? is that a potential solution to addressing some of your